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[Solved] columns are shrinking on every postbacks in 826 version

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Grid

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4 Answers, 1 is accepted

answered on 17 Sep 2009, 07:53 PM

Here is a code:

olaptest.aspx.cs file:

    
            using System;  
        
            using System.Data;  
        
            using System.Web.UI;  
        
            using System.Web.UI.WebControls;  
        
            using Telerik.Web.UI;  
        
            namespace wdttest  
        
            {  
        
             public partial class olaptest : System.Web.UI.Page  
        
             {  
        
              protected RadGrid RadGrid3 = new RadGrid();  
        
              DataTable datatable = new DataTable();  
        
              int columns=1;  
        
              protected void Page_Init(object sender, EventArgs e)  
        
              {  
        
               RadGrid3.ID = "RadGrid3"; RadGrid3.AutoGenerateColumns = false;  
        
               RadGrid3.ClientSettings.Resizing.AllowColumnResize = true;    // ???  
        
              }  
        
              protected void Page_Load(object sender, System.EventArgs e)  
        
              {   
        
               if (!Page.IsPostBack) { Session["columns"] = columns = 1; }  
        
               columns = (int)Session["columns"];  
        
              }  
        
              protected void Page_PreRender(object sender, System.EventArgs e)  
        
              {  
        
               for (int i = 0; i < columns; i++)  
        
                {  
        
                 datatable.Columns.Add("c" + i);  
        
                 GridTemplateColumn gtc = new GridTemplateColumn();  
        
                 gtc.HeaderText = ( i % 2 == 0 ) ? "UnitPrice" : "Quantity";   
        
                 gtc.ItemTemplate   = new itemTemplate("c" + i);  
        
                 RadGrid3.Columns.Add(gtc);  
        
                }  
        
               if (datatable.Columns.Count > 1) datatable.Rows.Add(new string[] { "2747", "3036" });  
        
               else                             datatable.Rows.Add(new string[] { "6055" });   
        
               RadGrid3.DataSource = datatable;  
        
               RadGrid3.DataBind();  
        
               PlaceHolder1.Controls.Add(RadGrid3);  
        
              }  
        
              // class template for item grid  
        
              private class itemTemplate : ITemplate  
        
              {  
        
               Label lc; private string colname;  
        
               public itemTemplate(string acolname) { colname = acolname; }  
        
               public void InstantiateIn(Control container)  
        
               {  
        
                lc = new Label();  
        
                lc.DataBinding += new EventHandler(lc_DataBinding);  
        
                container.Controls.Add(lc);  
        
               }  
        
               void lc_DataBinding(object sender, EventArgs e)  
        
               {  
        
                Label alc = (Label)sender;  
        
                GridDataItem container = (GridDataItem)alc.NamingContainer;  
        
                alc.Text = ((DataRowView)container.DataItem)[colname].ToString();  
        
               }  
        
              } // end of a class itemTemplate  
        
              protected void oneColumns_Click(object sender, EventArgs e)   
        
              { Session["columns"] = columns = 1; }  
        
              protected void twoColumns_Click(object sender, EventArgs e)   
        
              { Session["columns"] = columns = 2; }  
        
             } // end class  
        
            }  // end namespace

olaptest.aspx file:

    
            <%@ Page Language="c#" CodeBehind="olaptest.aspx.cs" Inherits="wdttest.olaptest" %> 
        
            <%@ Register assembly="Telerik.Web.UI" namespace="Telerik.Web.UI" tagprefix="telerik" %> 
        
            <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" > 
        
            <html> 
        
            <head id="shrinkingcolumns" runat="server"><title>Shrinking columns</title></head>  
        
            <body>   
        
             <form id="Form1" method="post" runat="server">  
        
              <asp:ScriptManager ID="ScriptManager1" runat="server" /> 
        
              Click "make a postback" a few times. Nothing will change.<br /> 
        
              Click "Two comumns" and click "make a postback" a few times.<br /> 
        
              The width of the columns is shrinking each times you are clicking.<br /> 
        
              <asp:PlaceHolder ID="PlaceHolder1"  runat="server" /><br /> 
        
              <asp:Button ID="makePostback" Text="make a postback" runat="server" /> 
        
              <asp:Button ID="twoColumns"   Text="Two columns"     runat="server" OnClick="twoColumns_Click" /> 
        
              <asp:Button ID="oneColumns"   Text="One column"      runat="server" OnClick="oneColumns_Click" /> 
        
             </form> 
        
            </body> 
        
            </html>

I have tested on IE8 and Firefox 3.5.

answered on 18 Sep 2009, 04:58 PM

Hi Ildar,

We recommend adding RadGrid columns at runtime in Page_Load or earlier. Moreover, template columns must be added in Page_Init.

Please rework your implementation to comply with the RadGrid programmatic creation guidelines below and let us know if you need further assistance.

http://www.telerik.com/help/aspnet-ajax/grdprogrammaticcreation.html

As for the column resizing change, yes, we made a change, related to the MasterTableView's TableLayout, which is related to the ClientSettings.Resizing.ClipCellContentOnResize property. Try setting that to "false".

Best wishes,
Dimo
the Telerik team

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